import deepClone from "./deepClone";

// JS对象深度合并
function deepMerge(target = {}, source = {}) {
    target = deepClone(target);
    if (typeof target !== 'object' || typeof source !== 'object') return false;
    for (var prop in source) {
        if (!source.hasOwnProperty(prop)) continue;
        if (prop in target) {
            if (typeof target[prop] !== 'object') {
                target[prop] = source[prop];
            } else {
                if (typeof source[prop] !== 'object') {
                    target[prop] = source[prop];
                } else {
                    if (target[prop].concat && source[prop].concat) {
                        target[prop] = target[prop].concat(source[prop]);
                    } else {
                        target[prop] = deepMerge(target[prop], source[prop]);
                    }
                }
            }
        } else {
            target[prop] = source[prop];
        }
    }
    return target;
}

export default deepMerge;